problem with example of mpn_gcd

[Alan McFarlane]

Try this code Jang...


#include <stdio.h>
#include <stdlib.h> /* needed for exit() prototype */
#include <gmp.h>

int main (int argc, char **argv)
{
	mpz_t a, b, p;

	if (argc != 3)
	{
		printf("Usage: %s <number> <number>\n", argv[0]);
		
		exit(1);
	}

	/* Initialize and assign a and b from base 10 strings in argv */
	mpz_init_set_str(a, argv[1], 10);
	mpz_init_set_str(b, argv[2], 10);

	/* Initialize p */
	mpz_init(p);

	/* compute the gcd of a and b*/
	mpz_gcd(p, a, b);

	/* Print p in base 10 */
	mpz_out_str(stdout, 10, p);

	fputc('\n', stdout);

	/* Since we're about to exit, no need to clear out variables */
	/* But, we will do (force of habit!) */
	mpz_clear(p);
	mpz_clear(b);
	mpz_clear(a);

	exit (0);
}




As for Décio's comments, they make me ashamed to be a programmer. 
Everyone has to learn somewhere, and I'll bet we all make simple 
mistakes (at least to those with a bit more experience).

Be nice Décio :)

--
Alan McFarlane




Décio Luiz Gazzoni Filho wrote:
> 
> On Jul 29, 2006, at 1:50 AM, Jiang wf wrote:
> 
>> hello, everyone,
>>
>> I just want use mpn_gcd to make a program, that can calculate gcd of 
>> two big integers, the following is my code named agcd.c:
>>
>>
>>
>> #include <stdio.h>
>> #include <gmp.h>
>>
>>     main (int argc, char **argv)
>>     {
>>       mpz_t a, b, p;
>>
>>       if (argc != 3)
>>         { printf ("Usage: %s <number> <number>\n", argv[0]); exit (1); }
>>
>>       /* Initialize and assign a and b from base 10 strings in argv */
>>       mpz_init_set_str (a, argv[1], 10);
>>       mpz_init_set_str (b, argv[2], 10);
>>       /* Initialize p */
>>       mpz_init (p);
>>
>>
>>       /* compute the gcd of a and b*/
>>      mp_size_t mpn_gcd (mp_limb_t *p, mp_limb_t *a,
>>           mp_size_an, mp_limb_t *b, mp_size_t bn)
>>
>>       /* Print p in base 10 */
>>       mpz_out_str (stdout, 10, p);
>>       fputc ('\n', stdout);
>>
>>       /* Since we're about to exit, no need to clear out variables */
>>       exit (0);
>>     }
>>
>>
>>
>> and when compiled, got the following error:
>>
>> agcd.c: In function 'main':
>> agcd.c:9: warning: incompatible implicit declaration of built-in 
>> function 'exit'
>> agcd.c:20: error: syntax error before 'mp_size_an'
>>
>>
>>
>>
>> so, please, anyone can give me some advise about this problem, thanks!
> 
> Well I can. Drop any pretenses of being a computer programmer and go be 
> a manager or CEO somewhere. You don't have what it takes to be a 
> programmer.
> 
> And whether you follow my advice or not, do not post to this mailing 
> list anymore. Your email nearly made me sick to my stomach.
> 
> Décio
> 
> 
> 
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